Before I take a look at the source code in an attempt to do it myself, is this something planned or on it's way? I'm fine with registered users posting freely regardless of wether or not they have a previously approved thread and I'd like only threads created by anonymous users to be moderated.
http://wordpress.org/extend/plugins/bbpressmoderation/
No imminent changes planned.
However the code is easy to change - In bbpressmoderation.php look at the function pre_insert() and at around line 125 add,
return $data
then all registered users bypass moderation.
I just got off of work, thanks for an easy solution. I'll make that changes now.